- #1
LizzzyBF
- 6
- 0
I'm in year twelve (in New Zealand, equivalent to 11th grade I think) and physics this year seems much harder than it was before. I usually got the equivalent of B's in physics last year, so I wasn't particularly great, and I want to get more A's this year (as eventually I want to be a physicist), but I don't know what I need to be doing to improve. Everything we do in class makes sense, including the example problems, but I find when we have to do problems for homework, I always go off in the wrong direction.
for example, I had a problem where you had to derive vf^2=vi^2+2ad by substituting vf=vi+at into d=(vi+vf/2)t and eliminating t. That was all given in the question. what I did was substitute straight away, but the answers say you rearrange vf=vi+at to make t the subject first. I can see in retrospect how that works, but I often find that I don't recognise things like that until I've been told.
What I'm looking for is what I can do to get good at figuring those sorts of things out, as I think that's the main reason I don't get fantastic marks.
for example, I had a problem where you had to derive vf^2=vi^2+2ad by substituting vf=vi+at into d=(vi+vf/2)t and eliminating t. That was all given in the question. what I did was substitute straight away, but the answers say you rearrange vf=vi+at to make t the subject first. I can see in retrospect how that works, but I often find that I don't recognise things like that until I've been told.
What I'm looking for is what I can do to get good at figuring those sorts of things out, as I think that's the main reason I don't get fantastic marks.